OBD-II code · Powertrain (generic)
P0C4D Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit High
The HV battery pack coolant pump A reports a supply voltage circuit high condition. Battery thermal management may be impaired.
Is it safe to drive with P0C4D?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire shorted to higher voltage
- PossibleAlternator overvoltage
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Coolant Pump A, Wiring Harness, Bms
Related codes
- P0C4AHybrid/EV Battery Pack Coolant Pump A Control Performance
- P0C4BHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit/Open
- P0C4CHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit Low
- P0C4EDrive Motor A Position Exceeded Learning Limit
- P0C4FDrive Motor B Position Exceeded Learning Limit
- P0C50Drive Motor A Position Sensor Circuit A Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.